Thanks for your input. If interested, our counsel provided a response. However, please consider as FYI and not legal advice that I myself am not qualified to give:
The request should come directly from an employee of the DOJ, and then if the DOJ chooses, it can share that information with the contractor. So, we recommend pursuing one of the following avenues:
Have the request come directly from a DOJ employee, and send the supporting documentation directly to the DOJ. If the DOJ then chooses to share the information with the contractor, it is out of the Bank's hands. Or,
Have the DOJ request and authorize the Bank in writing to provide the supporting documentation directly to the contractor. To be safe, the DOJ should likely be copied on any materials sent to the contractor in accordance with that request.